The Apc 650 va ups has the following features;

• APC Back-UPS 650VA, 230V, AVR, Universal Sockets
• Max Configurable Power (Watts)
• 325 Watts / 650VA
• Output Frequency (sync to mains) 50/60 Hz +/- 1 Hz Sync to mains
• Topology Line interactive
• Waveform type Stepped approximation to a sinewave
• Transfer Time 4 ms typical : 6 ms maximum
• Input frequency 50/60 Hz +/- 3 Hz Auto-sensing